What is the capacity of a standard CD-ROM? MCQ with Answer and Explanation

Question
What is the capacity of a standard CD-ROM?
A. 120 MB
B. 4.7 GB
C. 25 GB
D. 650-700 MB
Answer: Option D
Solution (By JKSSB Mock Tests)
A standard CD-ROM holds about 650 to 700 MB of data (or 74-80 minutes of audio). DVD holds 4.7 GB, and Blu-ray 25 GB.
This question belongs to: Computer Memory and Storage Devices
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Practice More Memory and Storage Devices Questions

Question #1
What is the function of a memory buffer register (MBR)?
A. To hold the memory address
B. To manage cache
C. To store the instruction
D. To hold data read from or written to memory
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Correct Answer: Option D

Explanation:
The MBR holds the data that is being transferred to or from memory, acting as an intermediate storage.
This question belongs to: Computer Memory and Storage Devices
Question #2
What is the approximate read speed of a typical SATA III SSD?
A. 50 MB/s
B. 50 GB/s
C. 500 MB/s
D. 5 GB/s
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Correct Answer: Option C

Explanation:
SATA III SSDs typically achieve sequential read speeds around 500-550 MB/s, limited by the SATA III interface (600 MB/s max). NVMe SSDs are faster.
This question belongs to: Computer Memory and Storage Devices
Question #3
What is the typical access time of a hard disk drive compared to RAM?
A. HDD access time is faster
B. RAM is slower
C. They are similar
D. HDD access time is much slower (milliseconds vs nanoseconds)
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Correct Answer: Option D

Explanation:
HDD access times are around 5-10 ms (milliseconds), while RAM access times are around 50-100 ns (nanoseconds), making RAM thousands of times faster.
This question belongs to: Computer Memory and Storage Devices
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